Mark Young was brought up in rural Worcestershire and Heredfordshire where, from primary school days, he became interested in wildflowers, butterflies, and moths. Since 1973 he has been lecturing on Zoology at Aberdeen University.He has done research on fresh-water pearl mussels and insects in forests andfarmlands, in addition to exploring the comparative ecology of rare moths and butterflies. Young has also been actively involved with the Scottish Wildlife Trust and with conservation studies for Scottish Natural Heritage. He is particularly interested in the moths of the Scottish highlands and the islandswhere he is often visiting in search of new colonies of burnet moths or obscure micro moths.

Praise for the Series"Each of these reviews is complete within its topic." --THE QUARTERLY REVIEW OF BIOLOGY

• S.S. Creasey and A.D. Rogers, Population Genetics of Bathyal and Abyssal Organisms.T. Brey, Growth Performance and Mortality in Aquatic Macrobenthic Invertebrates.Taxonomic Index.Subject Index.Cumulative Index of Titles.Cumulative Index of Authors.